Reflexes, or reflex actions, are involuntary, almost instantaneous movements in response to a specific stimulus. Reflex arcs that contain only two neurons, a sensory and a motor neuron, are considered monosynaptic. Examples of monosynaptic reflex arcs in humans include the patellar reflex and the Achilles reflex.
A microwave oven uses microwaves. This is a kind of electromagnetic wave. The energy source for the microwave oven is AC (alternating current, electricity), available in many houses.
Essentially, when using a counter top device rather than an conventional oven, a toaster oven will use about half the energy, while a microwave uses about one third of the energy. It's easy to see that you'll be using less energy over all if you go with a microwave.